JP2640726B2 - Signal lights for vehicles - Google Patents
Signal lights for vehiclesInfo
- Publication number
- JP2640726B2 JP2640726B2 JP6293616A JP29361694A JP2640726B2 JP 2640726 B2 JP2640726 B2 JP 2640726B2 JP 6293616 A JP6293616 A JP 6293616A JP 29361694 A JP29361694 A JP 29361694A JP 2640726 B2 JP2640726 B2 JP 2640726B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- resin member
- reflecting mirror
- signal lamp
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は車両用の灯具に関するも
のであり、詳細には尾灯、方向指示灯など信号用の灯具
に係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp, and more particularly to a signal lamp such as a tail lamp and a direction indicator lamp.
【０００２】[0002]
【従来の技術】従来のこの種の車両用信号灯具９０の構
成の例を示すものが図４であり、通常には反射鏡９１は
ハウジング９２に一体化して樹脂部材により形成される
ものとされている。このときに、前記反射鏡９１は、例
えば光源９３を焦点とする回転放物面として形成される
と共に、ハウジング９２の内面も含めてアルミの真空蒸
着などにより反射膜９１ａが形成され、前記光源９３か
らの光を平行光線として照射方向に反射させるものとさ
れている。2. Description of the Related Art FIG. 4 shows an example of the structure of a conventional vehicle signal lamp 90 of this type. In general, a reflecting mirror 91 is formed integrally with a housing 92 by a resin member. ing. At this time, the reflecting mirror 91 is formed as, for example, a paraboloid of revolution having the light source 93 as a focal point, and a reflecting film 91a is formed on the inner surface of the housing 92 by vacuum evaporation of aluminum. Is reflected in the irradiation direction as parallel rays.
【０００３】また、前記ハウジング９２の照射方向側に
はレンズカット９４ａが施されたレンズ９４が設けら
れ、前記した平行光線にレンズカット９４ａにより適宜
な拡散を与え、関係規格などにより定められる配光特性
に合致するものとされている。尚、前記ハウジング９２
の成形上の都合などによっては反射鏡９１とハウジング
９２とが別体として設けられることもある。A lens 94 provided with a lens cut 94a is provided on the irradiation direction side of the housing 92, and the parallel light is appropriately diffused by the lens cut 94a, and a light distribution determined by a related standard or the like. It is said that it matches the characteristics. The housing 92
In some cases, the reflecting mirror 91 and the housing 92 may be provided as separate bodies depending on the molding convenience.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前記反
射鏡９１（ハウジング９２も含め）に反射膜９１ａを形
成させると言うことは、一般的にこの種の車両用信号灯
具９０はリアコンビネーションランプと称されて複数の
灯具が組合わされているものであるので、ハウジング９
２は大型化しているものであり、このハウジング９２を
収納する真空槽も大型のものが必要となり、設備費が高
価となる問題点を生じる。However, the fact that the reflecting film 91a is formed on the reflecting mirror 91 (including the housing 92) generally means that this kind of vehicle signal lamp 90 is called a rear combination lamp. And a plurality of lamps are combined, so that the housing 9
Reference numeral 2 denotes a large-sized one, and a large-sized vacuum tank for accommodating the housing 92 is required, which causes a problem that equipment costs are high.
【０００５】また、真空蒸着で得られた反射膜９１ａは
膜厚が極めて薄いものであるので、使用時の熱、湿度な
どにより劣化を生じないように透明塗料などによりトッ
プコートと称される保護膜９１ｂを施さなければ成らな
いものとなり、上記の蒸着工程と加えて塗装工程も必要
となり、工程数が増加して加工費など直接経費も上昇
し、車両用信号灯具９０がコストアップする問題点も生
じ、これらの点の解決が課題とされるものとなってい
る。Since the reflective film 91a obtained by vacuum evaporation has a very small thickness, it is protected by a transparent paint or the like so as to prevent deterioration due to heat and humidity during use. Since the film 91b must be applied, a coating step is required in addition to the above-described vapor deposition step, and the number of steps is increased, so that direct costs such as processing costs are increased, and the cost of the vehicle signal lamp 90 is increased. There is also a problem, and the solution of these points is an issue.
【０００６】[0006]
【課題を解決するための手段】本発明は前記した従来の
課題を解決するための具体的な手段として、反射鏡を有
し、この反射鏡に光源からの光を反射させ照射方向に収
束させる構成とした車両用信号灯具において、前記車両
用信号灯具の反射鏡または反射鏡とハウジングとは、透
明で且つ屈折率の異なる樹脂部材の２種類以上を適宜な
混合比で混合若しくは混練した複合樹脂で射出成形によ
り成形されて反射面が形成されていることを特徴とする
車両用信号灯具を提供することで、上記反射膜および保
護膜を不要として課題を解決するものである．According to the present invention, as a specific means for solving the above-mentioned conventional problems, a reflecting mirror is provided, which reflects light from a light source and converges the light in the irradiation direction. In the vehicle signal lamp configured as above, the reflecting mirror or the reflecting mirror and the housing of the vehicle signal lamp are a composite resin obtained by mixing or kneading two or more kinds of transparent and different refractive index resin members at an appropriate mixing ratio. The object of the present invention is to provide a vehicular signal lamp characterized in that a reflection surface is formed by injection molding, thereby eliminating the need for the reflection film and the protective film.
【０００７】[0007]
【実施例】つぎに、本発明を図に示す一実施例に基づい
て詳細に説明する。図１に符号１で示すものは本発明に
係る車両用信号灯具であり、この車両用信号灯具１はハ
ウジング３と一体に形成される例えば回転放物面とされ
た反射鏡２と、光源４と、レンズカット５ａが施された
レンズ５とで構成されるものである点は従来例のものと
同様である。Next, the present invention will be described in detail based on an embodiment shown in the drawings. 1 is a vehicle signal lamp according to the present invention. The vehicle signal lamp 1 includes a reflecting mirror 2 formed integrally with a housing 3 and having, for example, a paraboloid of revolution, and a light source 4. And a lens 5 having a lens cut 5a as in the conventional example.
【０００８】ここで、本発明においては前記反射鏡２
（ハウジング３も含め）自体が反射機能を有するものと
して形成され、従来例のもののように反射鏡２に反射膜
および保護膜が施されることはないものとされ、これら
を形成するための組立工程数、および真空槽などの設備
を不要のものとしている。In the present invention, the reflection mirror 2 is used.
(Including the housing 3) itself is formed as having a reflecting function, and the reflecting mirror 2 is not provided with a reflecting film and a protective film unlike the conventional example. The number of processes and equipment such as vacuum chambers are unnecessary.
【０００９】図２は模式的に示す本発明の反射鏡２の構
成および作用であり、この反射鏡２はハウジング３を含
め図示のように透明で且つ屈折率の異なる２種類の樹脂
部材、即ち、第一の樹脂部材Ｐ１と第二の樹脂部材Ｐ２
とによる積層構成とされ、夫々の第一の樹脂部材Ｐ１と
第二の樹脂部材Ｐ２との接する境界面で生じる反射率ｒ
１、ｒ２、ｒ３・・・ｒＮの総合で反射鏡２に反射特性
を与えるものとされている。FIG. 2 schematically shows the structure and operation of the reflecting mirror 2 of the present invention. The reflecting mirror 2 includes a housing 3 and two kinds of resin members which are transparent and have different refractive indexes as shown in FIG. , A first resin member P1 and a second resin member P2
And a reflectance r generated at a boundary surface where the first resin member P1 and the second resin member P2 are in contact with each other.
The reflection characteristics are given to the reflecting mirror 2 by the total of 1, r2, r3... RN.
【００１０】以下に理解を容易とするために、上記の作
用を具体的な例で説明を行う。先ず、前記第一の樹脂部
材Ｐ１が屈折率ｎ１＝１．５８６のポリカーボネート
（ＰＣ）樹脂であり、第二の樹脂部材Ｐ２が屈折率ｎ２
＝１．４９２のポリメチルメタクリレート（ＰＭＭＡ）
樹脂であるとすれば、両樹脂部材Ｐ１、Ｐ２の接する境
界面では、ｒ（％）＝｛（ｎ１−ｎ２）／（ｎ１＋ｎ
２）｝2 ×１００の式で反射率ｒが求められ、上記の条
件では１境界面につきこの境界面に入射する光の略０．
１％を反射するものとなる。In order to facilitate understanding, the above operation will be described with a specific example. First, the first resin member P1 is a polycarbonate (PC) resin having a refractive index n1 = 1.586, and the second resin member P2 is a refractive index n2.
= 1.492 polymethyl methacrylate (PMMA)
Assuming that the resin is a resin, r (%) = ｛(n1−n2) / (n1 + n)
2) The reflectance r is obtained by the formula of｝ 2 × 100, and under the above conditions, about 0.
It reflects 1%.
【００１１】[0011]
【００１２】[0012]
【００１３】次いで、前記反射鏡２の形成方法について
説明を行う。本発明では上記にも説明したように、例え
ばポリカーボネート（ＰＣ）樹脂とポリメチルメタクリ
レート（ＰＭＭＡ）樹脂とのように、透明で且つ屈折率
の異なる第一の樹脂部材Ｐ１と第二の樹脂部材Ｐ２とで
反射鏡２を形成するものであるので、先ず、例えばペレ
ット状態の両樹脂部材Ｐ１、Ｐ２を適宜な混合比で均一
に混合し射出成形機（図示せず）に供給する。Next, a method for forming the reflecting mirror 2 will be described. In the present invention, as described above, the first resin member P1 and the second resin member P2 which are transparent and have different refractive indices, such as a polycarbonate (PC) resin and a polymethyl methacrylate (PMMA) resin. Thus, first, for example, both resin members P1 and P2 in a pellet state are uniformly mixed at an appropriate mixing ratio and supplied to an injection molding machine (not shown).
【００１４】上記射出成形機中においては、混合された
両樹脂部材Ｐ１、Ｐ２は加熱溶融され、この射出成形機
中のスクリューなどで混練されながら射出口に移送さ
れ、更に前記反射鏡２を形成すべき金型中にゲートから
射出されるものとなるが、このときに、第一の樹脂部材
Ｐ１がＰＣ樹脂であり、第二の樹脂部材Ｐ２がＰＭＭＡ
樹脂である場合には、ＰＭＭＡ樹脂が流動性に優れるの
で、ＰＭＭＡ樹脂でＰＣ樹脂を囲むようにして射出成形
が行われる。In the injection molding machine, the mixed resin members P1 and P2 are heated and melted, and are transferred to an injection port while being kneaded by a screw or the like in the injection molding machine. At this time, the first resin member P1 is made of PC resin and the second resin member P2 is made of PMMA.
If the resin is a resin, the PMMA resin is excellent in fluidity, so that the injection molding is performed so as to surround the PC resin with the PMMA resin.
【００１５】また、このときに前記反射鏡２は前記ハウ
ジング３を含めて、湾曲しているとは言えほヾ一定板厚
の板面状であるので、小さな開口部であるゲートから金
型中に射出が行われたときには両樹脂部材Ｐ１、Ｐ２の
混合樹脂は板厚方向には少なく、板面方向には非常に大
きく拡散しながら金型内を充填するものとなる。At this time, since the reflecting mirror 2 including the housing 3 has a plate-like shape with a substantially constant plate thickness, although it is curved, the reflecting mirror 2 can be removed from the gate, which is a small opening, through the mold. When the injection is performed, the mixed resin of the two resin members P1 and P2 is small in the plate thickness direction, and very widely diffuses in the plate surface direction to fill the inside of the mold.
【００１６】従って、ＰＭＭＡ樹脂（Ｐ２）中に囲まれ
るＰＣ樹脂（Ｐ１）も板面方向に大きく伸長されるもの
となり、図３に模式的に示すように反射鏡２の板厚ｔ方
向にはＰＭＭＡ樹脂（Ｐ２）中にフィルム状と成ったＰ
Ｃ樹脂（Ｐ１）が多層に存在するものとなり夫々の樹脂
部材間に境界面を生じて、実質的には積層構成と同じ作
用を成す構成が得られるものとなるのである。Accordingly, the PC resin (P1) surrounded by the PMMA resin (P2) is also greatly elongated in the plate surface direction, and as shown schematically in FIG. P formed into a film in PMMA resin (P2)
The C resin (P1) exists in multiple layers, and a boundary surface is formed between the respective resin members, so that a configuration having substantially the same operation as the laminated configuration can be obtained.
【００１７】ここで、上記の境界面を所望の通りに反射
鏡２内に得るための第一の樹脂部材Ｐ１と第二の樹脂部
材Ｐ２との混合比について説明を行う。尚、この説明時
には上記の説明と同様に、第一の樹脂部材Ｐ１がＰＣ樹
脂であり、第二の樹脂部材Ｐ２がＰＭＭＡ樹脂で有るも
のとする。Here, the mixing ratio of the first resin member P1 and the second resin member P2 for obtaining the above-described boundary surface in the reflecting mirror 2 as desired will be described. At this time, as in the above description, it is assumed that the first resin member P1 is a PC resin and the second resin member P2 is a PMMA resin.
【００１８】上記の条件で、反射鏡２の板厚ｔ内の境界
面の数の増加を図るときには、ＰＭＭＡ樹脂（Ｐ２）に
対するＰＣ樹脂（Ｐ１）の量を増加することで原理的に
は達成されるものとなる。しかしながら、ＰＭＭＡ樹脂
（Ｐ２）に対してＰＣ樹脂（Ｐ１）の量をあまりに多量
とするときには、ＰＣ樹脂（Ｐ１）を囲むＰＭＭＡ樹脂
（Ｐ２）の量が不足し、ＰＣ樹脂（Ｐ１）同士の融合を
生じて、逆に境界面の数は減少する。In order to increase the number of boundary surfaces within the plate thickness t of the reflecting mirror 2 under the above-mentioned conditions, it is possible in principle to increase the amount of the PC resin (P1) relative to the PMMA resin (P2). Will be done. However, when the amount of the PC resin (P1) is too large relative to the PMMA resin (P2), the amount of the PMMA resin (P2) surrounding the PC resin (P1) becomes insufficient, and the fusion of the PC resins (P1) occurs. And conversely, the number of interfaces decreases.
【００１９】従って、第一の樹脂部材Ｐ１と第二の樹脂
部材Ｐ２との混合比には適正な範囲を生じるものとな
り、発明者によるこの発明を成すための試作、検討の結
果では、第一の樹脂部材Ｐ１の１００重量部に対して、
第二の樹脂部材Ｐ２が３０〜３００重量部である範囲、
即ち、何れか一方の樹脂に対して他方の樹脂の量を最大
略３倍とする範囲が適正なものであることが確認され
た。Therefore, the mixing ratio between the first resin member P1 and the second resin member P2 has an appropriate range, and according to the results of trial manufacture and examination by the inventor to realize the present invention, 100 parts by weight of the resin member P1
A range in which the second resin member P2 is 30 to 300 parts by weight,
That is, it was confirmed that the range in which the amount of the other resin was at most approximately three times that of any one of the resins was appropriate.
【００２０】また、上記の試作、検討の結果では、本発
明に採用可能な樹脂部材は上記に記載したものを含め
て、ポリカーボネート（ＰＣ）樹脂、ポリメチルメタク
リレート（ＰＭＭＡ）樹脂、アクリロニトリル‐スチレ
ン（ＡＳ）樹脂、アクリロニトリル‐ブタジエン‐スチ
レン（ＡＢＳ）樹脂、ポリエチレン（ＰＥ）樹脂、ポリ
スチレン（ＰＳ）樹脂、塩化ビニル（ＰＶＣ）樹脂な
ど、透明性を有する熱可塑性樹脂のほヾ全てが採用可能
である。According to the results of the above trial manufacture and examination, the resin members that can be employed in the present invention, including those described above, include polycarbonate (PC) resin, polymethyl methacrylate (PMMA) resin, acrylonitrile-styrene ( Almost all transparent thermoplastic resins such as AS) resin, acrylonitrile-butadiene-styrene (ABS) resin, polyethylene (PE) resin, polystyrene (PS) resin, and vinyl chloride (PVC) resin can be used. .
【００２１】そして、上記記載の樹脂群からハウジング
３を含めて反射鏡２を形成する樹脂を選択するときに
は、屈折率の差ができるだけ大きく、且つ、流動性にも
差がある樹脂部材の２種類を選択し、適宜な混合比とし
て上記にも説明したように射出成形を行えば良いもので
ある。When selecting the resin forming the reflecting mirror 2 including the housing 3 from the resin group described above, there are two types of resin members having a difference in refractive index as large as possible and a difference in fluidity. And injection molding may be performed as described above with an appropriate mixing ratio.
【００２２】尚、上記の樹脂を選択するに当たっては２
種類以上、例えば３種類を選択し混合して射出成形を行
っても、上記の説明から容易に理解できるように光学的
には２種類を選択したときとほぼ同様の作用が得られる
ものとなる。従って、若しも選択した２種類では機械的
強度に不足を生じる場合などには、機械的強度に優れる
樹脂部材を第３種目として選択することも可能である。Incidentally, in selecting the above resin, 2
Even if three types or more, for example, three types are selected and mixed, and injection molding is performed, as can be easily understood from the above description, substantially the same operation as when two types are selected is obtained optically. . Therefore, in the case where the mechanical strength is insufficient with the two types selected, a resin member having excellent mechanical strength can be selected as the third type.
【００２３】[0023]
【発明の効果】以上に説明したように本発明により、車
両用信号灯具の反射鏡または反射鏡とハウジングとは、
透明で且つ屈折率の異なる樹脂部材の２種類以上を適宜
な混合比で混合若しくは混練した複合樹脂で射出成形に
より成形されて反射面が形成されている車両用信号灯具
としたことで、反射鏡の板厚面方向に屈折率の異なる２
種類以上の樹脂部材の境界面を多層に生じさせ、この境
界面の夫々で反射を生じさせ、総合してこの種の車両用
信号灯具の反射鏡として充分な反射率が得られるものと
し、従来はアルミ真空蒸着などにより行っていた反射膜
を不要とする。As described above, according to the present invention, the reflector or the reflector and the housing of the vehicular signal lamp are formed by
A vehicle signal lamp having a reflective surface formed by injection molding of a composite resin obtained by mixing or kneading two or more types of transparent resin members having different refractive indices at an appropriate mixing ratio to form a reflecting mirror. 2 having different refractive indexes in the thickness direction of
Conventionally, it is assumed that the boundary surface of resin members of more than one kind is generated in multiple layers, reflection is generated at each of these boundary surfaces, and that a sufficient reflectance as a reflector of this kind of signal light for vehicles is obtained in total. Eliminates the need for a reflective film performed by aluminum vacuum evaporation or the like.
【００２４】従って当然に、前記反射膜を保護するため
の保護膜も不要となり、これにより、反射鏡は射出成形
で成形したままの状態で使用可能な状態となり、上記し
た真空蒸着の設備、工数および保護膜形成の工数などが
一切不要なものとなり、よって、この種の車両用信号灯
具のコストダウンに極めて優れた効果を奏するものであ
る。Therefore, naturally, a protective film for protecting the reflective film is not required, so that the reflective mirror can be used as it is formed by injection molding. In addition, the man-hour and the like for forming the protective film are not required at all, and therefore, this type of vehicle signal lamp has an extremely excellent effect in reducing the cost.
【図１】 本発明に係る車両用信号灯具の一実施例を示
す断面図である。FIG. 1 is a sectional view showing an embodiment of a vehicular signal light according to the present invention.
【図２】 同じ実施例の作用を模式的に示す拡大断面図
である。FIG. 2 is an enlarged sectional view schematically showing the operation of the same embodiment.
【図３】 同じ実施例の要部を拡大して示す模式的な断
面図である。FIG. 3 is a schematic cross-sectional view showing an enlarged main part of the same embodiment.
【図４】 従来例を示す断面図である。FIG. 4 is a sectional view showing a conventional example.
１……車両用信号灯具 ２……反射鏡 ３……ハウジング ４……光源 ５……レンズ ｒ……反射率 Ｐ１……第一の樹脂部材 Ｐ２……第二の樹脂部材 ｎ１……第一の樹脂部材の屈折率 ｎ２……第二の樹脂部材の屈折率 DESCRIPTION OF SYMBOLS 1 ... Vehicle signal light 2 ... Reflector 3 ... Housing 4 ... Light source 5 ... Lens r ... Reflectivity P1 ... First resin member P2 ... Second resin member n1 ... First Refractive index of resin member n2 ... Refractive index of second resin member
Claims (2)
光を反射させ照射方向に収束させる構成とした車両用信
号灯具において、前記車両用信号灯具の反射鏡または反
射鏡とハウジングとは、透明で且つ屈折率の異なる樹脂
部材の２種類以上を適宜な混合比で混合若しくは混練し
た複合樹脂で射出成形により成形されて反射面が形成さ
れていることを特徴とする車両用信号灯具。1. A vehicular signal lamp having a reflector, wherein light from a light source is reflected by the reflector and converged in an irradiation direction. A signal light for a vehicle, wherein a reflection surface is formed by injection molding of a composite resin obtained by mixing or kneading two or more types of transparent and different refractive index resin members at an appropriate mixing ratio. .
一方の樹脂部材の１００重量部に対して、他方の樹脂部
材が３０〜３００重量部であることを特徴とする請求項
１記載の車両用信号灯具。2. The mixing ratio of the two or more resin members is as follows:
The vehicle signal lamp according to claim 1, wherein the other resin member is 30 to 300 parts by weight with respect to 100 parts by weight of one resin member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6293616A JP2640726B2 (en) | 1994-11-04 | 1994-11-04 | Signal lights for vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6293616A JP2640726B2 (en) | 1994-11-04 | 1994-11-04 | Signal lights for vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08138418A JPH08138418A (en) | 1996-05-31 |
| JP2640726B2 true JP2640726B2 (en) | 1997-08-13 |
Family
ID=17797023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6293616A Expired - Lifetime JP2640726B2 (en) | 1994-11-04 | 1994-11-04 | Signal lights for vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2640726B2 (en) |
-
1994
- 1994-11-04 JP JP6293616A patent/JP2640726B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08138418A (en) | 1996-05-31 |
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